Among his journalistic credits, apart from his work at Time, Geary was Editor at Large for Ode magazine[4] and writes online for The Huffington Post, Salon.com and the Certified Financial Planner Board of Standards Inc's Newsletter.
Geary's literary efforts include Geary’s Guide to the World's Great Aphorists (2007), claimed to be the largest collection of aphorisms in the English language, and follows on from his previous volume on aphorists and aphorisms, The World in a Phrase (2006). It was published in the UK as We Are What We Think. It has also been published in Brazilian Portuguese – as O Mundo em uma Frase – and Korean. He also wrote a popular science book called The Body Electric (2002), a survey of cybernetic projects attempting to replace or enhance human biological senses (also published in Spain as El Cuerpo Electrónico),[6] and two much earlier books of poetry written while he was a student in San Francisco, 17 Reasons Why and Words for Refrigerator Doors.
Geary wrote I Is an Other: The Secret Life of Metaphor and How It Shapes the Way We See the World (2011), described on his website as "a fascinating look at metaphors and their influence in every aspect of our lives, from ordinary conversation and commercial messaging to news reports and political speeches".[7] The book has also been translated into Mandarin Chinese.[8]
Geary publishes a blog about aphorisms, All Aphorisms, All The Time. He is a regular speaker at literary festivals[9] where he gives a largely unscripted lecture on aphorisms which includes his juggling routine.